Sounds of pigeons (or doves) taking off.
Those were made in studio, using foley techniques. Hence, no cooing, no background traffic or other nature sounds, and no acoustic reflections. Just clean wing flaps.
5 mono takes of one pigeon, 1 stereo mix of two pigeons, and 1 mono take of a whole flock. You can of course combine those takes to make your own stereo flock. All in 16bits 48KHz.
Price: Free !